Since surface coil profiles are not usually arranged
for optimal encoding along the undersampled direction, we address this with a
sequence that uses RF excitation to create virtual coil profiles.These virtual coil profiles can be chosen
to optimally complement the undersampled data, and previous work showed that
encoding with bar-like RF profiles significantly improved the achievable
acceleration of Cartesian undersampled data.With the increasing availability of high powered nonlinear gradient
sets, other shapes are possible that can better complement the azimuthal
arrangement of multichannel coils.Exploiting this flexibility, we present an implementation of ring-like
RF profiles (BARings) and the acceleration enhancements they can bring to
multichannel radial acquisitions.